.youshang{
    width:1000px;
   display: flex;
    justify-content: center;
  
}
.changyongdizhi{
    width:800px;
    font-size:16px;
    padding-top: 20px;
  
}
.xinzeng{
    width:100px;
    padding-top: 10px;
}
.youxia{
    text-align:center;
    font-size: 20px;
}